unable to upgrade ubuntu from 14.04 to 16.04

[Ralf Mardorf]

On Mon, 28 Mar 2016 18:35:07 +1000, Jared Norris wrote:
>On 28 March 2016 at 18:24, 李白|字一日 <calidion at gmail.com> wrote:
>
>> I can't send u full executing flow message due to size control, but
>> the result is the same.

You could paste the output at http://pastebin.com/ or a similar site.
 
>Now, for this particular thread, there is several warnings in large red
>text on the release notes saying no one should upgrade from 14.04 to
>16.04 due to known bugs [2].

OTOH I didn't read those warnings, but you should consider to read
them, perhaps they explain what's going wrong and there's no need to
post the output anymore.